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   <div id="projectbrief">c++ math library</div>
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<div class="title">ray3d.cpp</div>  </div>
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<a href="ray3d_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;﻿</div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="__gbmath_8h.html" title="MAIN INCLUDE HEADER. ">_gbmath.h</a>&quot;</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;</div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;</div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="keyword">namespace </span>gbmath</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;{</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#abb0bc364a71a767de8b1c4cbdae79402">   11</a></span>&#160;<span class="keywordtype">bool</span>  <a class="code" href="classgbmath_1_1ray3d.html#abb0bc364a71a767de8b1c4cbdae79402" title="http://netlib.narod.ru/library/book0032/ch15_04.htm ">ray3d::checkIntersectSphere</a>(<span class="keyword">const</span> <a class="code" href="classgbmath_1_1sphere.html" title="The scope of the center point and radius. She Bounding sphere. ">sphere</a>&amp; <a class="code" href="classgbmath_1_1sphere.html" title="The scope of the center point and radius. She Bounding sphere. ">sphere</a>)<span class="keyword"> const</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;     <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a> v =  this-&gt;<a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a> - sphere.<a class="code" href="classgbmath_1_1sphere.html#a77fc8034e9af445efa9b69843d671595" title="center of sphere. ">center</a>;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;     <span class="keywordtype">float</span> b = 2.0f * this-&gt;<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(v);</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;     <span class="keywordtype">float</span> c =    v.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(v) - (sphere.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a> * sphere.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a>);</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;     <span class="keywordtype">float</span> discriminant = (b * b) - (4.0f * c);</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;     <span class="keywordflow">if</span>(discriminant &lt; 0.0f)</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;     {</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;          <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;     }</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;     discriminant = sqrtf(discriminant);</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;     <span class="keywordtype">float</span> s0 = (-b + discriminant) / 2.0f;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;     <span class="keywordtype">float</span> s1 = (-b - discriminant) / 2.0f;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;     <span class="keywordflow">if</span>(s0 &gt;= 0.0f || s1 &gt;= 0.0f)</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;     {</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;          <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;     }</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;     <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;}</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#ac74b645b7246c6b82d5fd590094fd118">   40</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgbmath_1_1ray3d.html#ac74b645b7246c6b82d5fd590094fd118" title="http://www.gamecoder.ru/2011/04/3d-3d.html ">ray3d::checkIntersectSphere_2</a> (<span class="keyword">const</span> <a class="code" href="classgbmath_1_1sphere.html" title="The scope of the center point and radius. She Bounding sphere. ">sphere</a>&amp; <a class="code" href="classgbmath_1_1sphere.html" title="The scope of the center point and radius. She Bounding sphere. ">sphere</a>, <span class="keywordtype">float</span>* result)</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;{</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;     <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a> vect = <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a> - sphere.<a class="code" href="classgbmath_1_1sphere.html#a77fc8034e9af445efa9b69843d671595" title="center of sphere. ">center</a> ;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;   <span class="keyword">const</span> <span class="keywordtype">float</span> c = vect.<a class="code" href="structgbmath_1_1vec3.html#a39aeb4da19026149e85efbd62d70b66d">length_sq</a>() -  sphere.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a> * sphere.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a>;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;   <span class="keywordtype">float</span> res = 0.0f;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;   <span class="keywordflow">if</span>(c &lt; 0.0f)</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;   {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;       res = 0.0f;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;     <span class="keywordflow">if</span>(result) *result = 0.0f;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;      <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;   }</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  <span class="keyword">const</span>  <span class="keywordtype">float</span> b = vect.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>);</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;   <span class="keyword">const</span> <span class="keywordtype">float</span> d = b*b - c;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;   <span class="keywordflow">if</span> (d &lt; 0.0f)</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;   {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;      <span class="keywordflow">return</span> (<span class="keyword">false</span>);</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;   }</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;   <span class="keywordtype">float</span> root1 = -b - sqrt(c);</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;   <span class="keywordtype">float</span> root2 = -b + sqrt(c);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;   <span class="keywordflow">if</span>(root1 &gt;= root2)</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;       res = root1;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;      <span class="keywordflow">if</span>(result) *result = root1;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;   <span class="keywordflow">else</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;       res =  root2;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;      <span class="keywordflow">if</span>(result) *result = root2;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;   <span class="keywordflow">return</span> ( res &gt;= 0.0f );</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;}</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#a73a4af873dda7b326a47eaf724abf805">   83</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgbmath_1_1ray3d.html#a73a4af873dda7b326a47eaf724abf805" title="Aslan. ">ray3d::checkIntersectSphere_3</a>( <span class="keyword">const</span> <a class="code" href="classgbmath_1_1sphere.html" title="The scope of the center point and radius. She Bounding sphere. ">sphere</a>&amp; sph )</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;{</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> __infin__  = _INFCODE;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keywordtype">float</span> res = 0.0f;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    <span class="comment">// // в 10й студии нет xmath.h  Временное определение.</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    <span class="comment">// static const float INF = 1.0f/0.0f;</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <span class="comment">// квадрат радиуса</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> r =  (sph.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a> * sph.<a class="code" href="classgbmath_1_1sphere.html#abcbf635769e57912ba6473161b0a13b5" title="radius of sphere. ">radius</a>);</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    <span class="comment">// квадрат расстояния от точки до центра сферы</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <span class="keywordtype">float</span> d = 0.0f;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    {</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        <span class="comment">//  a ssert(false);</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <span class="comment">// inline float distance_sq(const vec3&amp; point) const { return vec3(*this-point).lenghtSq ;  }</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;        <span class="comment">//  vec3 vs = sph.center-orig;</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        <span class="comment">// d =  vs.length_sq(); //  sph.center.length_sq();//  lenghtSq(p); // norm2(c-p);</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        d = sph.<a class="code" href="classgbmath_1_1sphere.html#a77fc8034e9af445efa9b69843d671595" title="center of sphere. ">center</a>.<a class="code" href="structgbmath_1_1vec3.html#afb285453ff42d7071dd75848d87aeee4" title="Compute and return the square of the distance between the points and this point. ">distance_sq</a>(<a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>);</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    }</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="comment">// проекция центра сферы на луч</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    <span class="keywordtype">float</span> s =   (sph.<a class="code" href="classgbmath_1_1sphere.html#a77fc8034e9af445efa9b69843d671595" title="center of sphere. ">center</a>-<a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>).dot(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a30effe274e32c5af662df9477221982d">length</a>(); <span class="comment">//         sprod(c-p,l)/norm(l);</span></div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordflow">if</span>( (d&gt;r) &amp;&amp; (s&lt;0) ) <span class="comment">// точка снаружи сферы и луч направлен от сферы</span></div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    {</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        res = __infin__; <span class="comment">// return INF; // нет пересечения</span></div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    }</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  <span class="comment">// квадрат расстояния от прямой до центра сферы по теореме Пифагора</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;  <span class="keywordtype">float</span> h = d - s*s;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    <span class="keywordflow">if</span>(h &gt; r) <span class="comment">// луч не пересекает сферу</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    {</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        res = __infin__;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    }</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    res = s+sqrt(r-h)*<a class="code" href="namespacegbmath.html#ae98efd1a452855c4e8c7e8ef08bab2a1" title="Returns the sign of   x&gt;0 : 1   x=0 : 0   x&lt;0 : -1. ">gbmath:: sign</a>(r-d); <span class="comment">// расстояние до пересечения</span></div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160; </div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keywordflow">return</span>  <span class="keyword">true</span>;</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;}</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#a9c5da71e0e2bde40b23fd663d47822c4">  129</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgbmath_1_1ray3d.html#a9c5da71e0e2bde40b23fd663d47822c4">ray3d::checkIntersectAABB</a>(<span class="keyword">const</span> <a class="code" href="classgbmath_1_1aabb.html" title="Axis Aligned Bounding Box by min and max points. ">aabb</a>&amp; <a class="code" href="classgbmath_1_1aabb.html" title="Axis Aligned Bounding Box by min and max points. ">aabb</a>,  <span class="keywordtype">float</span>* result)</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;{</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;   <span class="comment">// We check if the ray is inside the box.</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;   <span class="keywordflow">if</span> (   <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a> &gt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;       &amp;&amp; <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a> &lt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;       &amp;&amp; <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> &gt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;       &amp;&amp; <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> &lt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a></div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;       &amp;&amp; <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a546e6c38e7c49102f064d130ed3475ee">z</a> &gt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#a546e6c38e7c49102f064d130ed3475ee">z</a></div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;       &amp;&amp; <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a546e6c38e7c49102f064d130ed3475ee">z</a> &lt;= aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#a546e6c38e7c49102f064d130ed3475ee">z</a>)</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;   {</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;      *result = 0.0f;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;      <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;   }</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;   <span class="keywordtype">float</span> t_near = FLT_MIN;</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;   <span class="keywordtype">float</span> t_far = FLT_MAX;</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;   <span class="keywordtype">float</span> t1;</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;   <span class="keywordtype">float</span> t2;</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;   <span class="keywordtype">float</span> tmp;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;   <span class="keywordflow">if</span>(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a> != 0.0f)</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;   {</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;      t1 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a>;</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;      t2 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a5fb2cf8734338da1ad7b4251a3bde292">x</a>;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t2)</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;      {</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;         tmp = t1;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;         t2 = t1;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;         t2 = tmp;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;      }</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t_near)</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;      {</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;         t_near = t1;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;      }</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;      <span class="keywordflow">if</span>(t2 &lt; t_far)</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;      {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;         t_far = t2;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;      }</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;      <span class="keywordflow">if</span>(t_near &gt; t_far) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;      <span class="keywordflow">if</span>(t_far &lt; 0) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;   }</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;   <span class="keywordflow">if</span>(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> != 0.0f)</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;   {</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;      t1 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;      t2 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t2)</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;      {</div>
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<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;         t2 = t1;</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;         t2 = tmp;</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;      }</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t_near)</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;      {</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;         t_near = t1;</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;      }</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;      <span class="keywordflow">if</span>(t2 &lt; t_far)</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;      {</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;         t_far = t2;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;      }</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;      <span class="keywordflow">if</span>(t_near &gt; t_far) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;      <span class="keywordflow">if</span>(t_far &lt; 0) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;   }</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;   <span class="keywordflow">if</span>(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#a546e6c38e7c49102f064d130ed3475ee">z</a> != 0.0f)</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;   {</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;      t1 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a8d9ee7f37938613852e9bad91560fadf">min</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;      t2 = (aabb.<a class="code" href="classgbmath_1_1aabb.html#a739cbaa1eef4c6f6d4018ed566fa9d5c">max</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a> - <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>) / <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>.<a class="code" href="structgbmath_1_1vec3.html#aa096d36a3c46c4224f0195f70eb580ec">y</a>;</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t2)</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;      {</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;         tmp = t1;</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;         t2 = t1;</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;         t2 = tmp;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;      }</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;      <span class="keywordflow">if</span>(t1 &gt; t_near)</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;      {</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;         t_near = t1;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;      }</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;      <span class="keywordflow">if</span>(t2 &lt; t_far)</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;      {</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;         t_far = t2;</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;      }</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;      <span class="keywordflow">if</span>(t_near &gt;= t_far) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;      <span class="keywordflow">if</span>(t_far &lt; 0) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;   }</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;   *result = t_near;</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;   <span class="keywordflow">return</span> (*result &lt; t_far &amp;&amp; *result &gt;= 0);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;}</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;</div>
<div class="line"><a name="l00240"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#a6589cd2393534894ffe78a49304a6128">  240</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgbmath_1_1ray3d.html#a6589cd2393534894ffe78a49304a6128">ray3d::checkIntersectPlane</a>( <span class="keyword">const</span> <a class="code" href="structgbmath_1_1plane__s.html" title="plane in 3d ">plane_s</a>&amp; plane , <span class="keywordtype">float</span>* pfOutResult )<span class="keyword"> const</span></div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a> plNrml = plane.<a class="code" href="structgbmath_1_1plane__s.html#af0f6fbb2bd21ca5a0644eea51ea7d107" title="return plane normal ">normal</a>();</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> alpha = plNrml.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(<a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>); <span class="comment">//    dotProduct(plane.normal, dir);</span></div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    <span class="keywordtype">float</span> fres = 0.0f;</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    <span class="keywordflow">if</span>(alpha != 0.0f)</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;    {</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        fres  = <span class="comment">//   ( - dotProduct(plane.normal(), orig ) + plane.d )/alpha;</span></div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;         ( -  plNrml.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(<a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>)  + plane.<a class="code" href="structgbmath_1_1plane__s.html#a6e8a5a04c1ed7f04ceadc93aa69d141c">d</a> ) / alpha;</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;       <span class="keywordflow">if</span>(pfOutResult)</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;       {</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;         *pfOutResult = fres ;</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;       }</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;      <span class="keywordflow">return</span> ( fres &gt;= 0.0f );</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;    }</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;}</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160; </div>
<div class="line"><a name="l00265"></a><span class="lineno"><a class="code" href="classgbmath_1_1ray3d.html#aeeef1c1186bfe39dae5ae94e970b53e1">  265</a></span>&#160;<span class="keywordtype">float</span> <a class="code" href="classgbmath_1_1ray3d.html#aeeef1c1186bfe39dae5ae94e970b53e1" title="http://www.gamespp.com/algorithms/collisionDetectionTutorial02.html find the distance between a ray a...">ray3d::distanceToPlane</a>( <a class="code" href="structgbmath_1_1plane__s.html" title="plane in 3d ">plane_s</a>&amp; plane )<span class="keyword">   const</span></div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;    <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a> vRayOrigin = <a class="code" href="classgbmath_1_1ray3d.html#a97752bf61a9b54152708cf1976c07115">orig</a>;</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a> vnRayVector = <a class="code" href="classgbmath_1_1ray3d.html#a1dad3371200a316e8678061da93bf62c">dir</a>;</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;    <span class="keyword">const</span>   <a class="code" href="structgbmath_1_1vec3.html" title="3d-base vector. Corrected by operators epislon ">vec3</a>&amp; vnPlaneNormal = plane.<a class="code" href="structgbmath_1_1plane__s.html#af0f6fbb2bd21ca5a0644eea51ea7d107" title="return plane normal ">normal</a>();</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> planeD = plane.<a class="code" href="structgbmath_1_1plane__s.html#a6e8a5a04c1ed7f04ceadc93aa69d141c">d</a>;</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    <span class="keywordtype">float</span> cosAlpha = vnRayVector.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(vnPlaneNormal);</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;    <span class="comment">// parallel to the plane (alpha=90)</span></div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;    <span class="keywordflow">if</span> (cosAlpha==0)</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;    {</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;        <span class="keywordflow">return</span> -1.0f;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;    }</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;    <span class="keywordtype">float</span>  deltaD = planeD -  vRayOrigin.<a class="code" href="structgbmath_1_1vec3.html#a4f2a1ebac341810c42a6c277760b134b">dot</a>(vnPlaneNormal); <span class="comment">//  DotProduct(vRayOrigin,vnPlaneNormal);</span></div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;    <span class="keywordflow">return</span> (deltaD/cosAlpha);</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;}</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;}</div>
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